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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 28TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.5V ~ 60V
- Frequency - Switching：50kHz ~ 1MHz
- Duty Cycle (Max)：99%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Power Good, Soft Start, Tracking
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3840MPFE#PBF is a high-voltage synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates from a 2.5V to 60V supply and supports Buck and Inverting topologies. The device delivers up to 20A output current with a single output channel. Key electrical parameters include a 1MHz switching frequency, 99% maximum duty cycle, and low quiescent current of 6µA (operating at 20µA). It functions within a temperature range of -55°C to +150°C and is housed in a TSSOP-EP-28 package.
Feature Summary
- Supports wide input voltage range from 2.5V to 60V for flexible power design
- Integrates accurate current limit functionality for robust protection
- Enables high-efficiency synchronous rectification in step-down applications
- Operates reliably across extended industrial temperature ranges
Applications
- Industrial power supplies requiring wide input tolerance
- Automotive electronics systems
- Distributed power architectures
- Point-of-load regulation modules
Procurement Notes
Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix #PBF indicates lead-free packaging compliance. Check current manufacturing status as some variants may be obsolete; validate availability and substitute options directly with the manufacturer before procurement planning.
Selection Notes
Select this controller for designs requiring high input voltages up to 60V and precise current limiting. Ensure the external MOSFETs support the required 20A current and voltage ratings. Verify that the application environment stays within the -55°C to +150°C operating range. Consider thermal management due to the TSSOP-EP-28 package constraints.
Part Context
This component belongs to the LT3840 series of synchronous buck regulators. It is designed for high-performance power management where efficiency and wide input range are critical. The MPFE variant denotes military/extended grade performance compared to standard commercial versions.
Replacement Considerations
LT3840MPFE#PBF is listed as obsolete. Direct substitutes include LT3840MPFE#PBF (same part) or general family equivalents like LT3840. Verify compatibility with existing PCB footprints and control logic.
